Based on the paragraph above，it is sho...

单项选择题
Based on the paragraph above，it is shown that in order to deploy IPv6 protocol on the Internet，（）has to be built.The network devices which need to communicate with both networks are required to have upgraded software or translator facilities in the movement of IPv4 to IPv6 transition，network infrastructures are relatively slow in this event.

A.separated network
B.mobile network
C.access network
D.radio network

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1.单项选择题As with all ITU standards，reduce energy consumption is a key factor taken into account at development stage.Indeed NGN sare believed to offer significant saving（）traditional networks.

A.of
B.over
C.at
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2.单项选择题The maximum data rate of any single wireless link can be described by the shannon’s theorem which is related to the bandwidth inhertz，and the （） on the channel.

A.signal frequency
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3.单项选择题The maximum data rate of any single wireless link can be described by the shannon’s theorem which is related tot he（）inhertz，and the noise on the channel.

A.signal frequency
B.bandwidth
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D.noise frequency

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4.单项选择题This implementation takes place at the（）level of OSI model network structure.

A.physical
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C.network
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5.单项选择题Wireless telecommunications networks are generally implemented and administered using（）communication

A.microwave
B.radio
C.FM
D.AM

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6.单项选择题基带”英文通常翻译为（）。

A.side band
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C.dual band
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